WO1998002262A1

WO1998002262A1 - Adjustable casting mould, and device for adjusting the mould surface thereof

Info

Publication number: WO1998002262A1
Application number: PCT/EP1997/003504
Authority: WO
Inventors: Otmar Fahrion
Original assignee: Otmar Fahrion
Priority date: 1996-07-11
Filing date: 1997-07-03
Publication date: 1998-01-22
Also published as: JP2000514360A; DE19627930A1; KR100562267B1; KR20000023696A

Abstract

The invention relates to an adjustable casting mould with a plurality of axially displaceable moulding pins. Each moulding pin has a self-locking threaded mechanism (82, 84) by way of which the moulding pin is supported on a carrier plate (80). The carrier plates (80) on which in each case a plurality of adjustable moulding pins (64) are mounted are, in turn, connected to a moulding-box housing member to be adjustable in a different manner perpendicular to the mould parting surface.

Description

Adjustable mold and device for adjusting the shape of such a surface

The invention relates to an adjustable mold according to the preamble of claim 1 and a device for adjusting the mold surface of such.

Known casting molds include those in which a sand mold box is prepared for casting a workpiece. Such sand mold boxes are well suited for the small series production of products. However, they are disadvantageous with regard to the disposal of the used molding sand. For example, when casting four propeller blades for one

3 ship propellers 80 m of molding sand to be disposed of.

By recycling used molding sand, these problems can only be partially solved. Reprocessing is also expensive. The preparation of the sand mold boxes is labor-intensive and time-consuming.

For the large-scale production of castings that are not too large, molds that can be used in multiple ways are also known. However, the production of these molds is very expensive, so that use in the production of products in small series is ruled out.

In DE 41 12 736 C2 for the production of a casting mold with an adjustable molding surface it has already been proposed to clamp rod-shaped molding pins, which can be moved in the axial direction against each other, in a frame, the end faces of the molding rods set differently having a stair curve molding surface adjustable geometry specifies. Such an adjustable casting mold has the disadvantage that the various shaped pins can only be firmly fixed in their position when all shaped pins have received the desired axial position. As long as this fixation has not yet taken place, the shaped pins can move under interference. In addition, fixing the positions of the molded pins by clamping the entire package of molded pins, whereby the fixing is done only by pure frictional engagement, is not unproblematic: on the one hand, the clamping forces can differ considerably from those under setting conditions due to the different thermal expansion of molded pins and clamping frames under casting conditions. On the other hand, the clamping forces in the molded pin pack must be transferred cleanly from one molded pin to the adjacent molded pin. This means that the side surfaces of the shaped pins must lie exactly flat against each other. The shaped pins must therefore be machined very precisely and cleaned appropriately when reused. Even if appropriate precautionary measures are taken, the production of adjustable casting molds for very large workpieces is not possible, since the shaped pins, which are only held by friction, cannot absorb greater loads in the axial direction and can be adjusted in an uncontrolled manner under the influence of the weight of larger molten metal quantities.

The present invention is therefore intended to develop an adjustable mold in accordance with the preamble of claim 1 in such a way that a more secure positional fixation of the individual shaped pins is ensured even when the shape is large.

According to the invention, this object is achieved by an adjustable goat shape with the one specified in claim 1 Characteristics.

In this case, the individual shaped pins are each supported by an assigned, adjustable strut. Since each shaped pin has its own support, which is independent of the support of adjacent shaped pins, molds of any size can be produced with the inventive concept without any problems.

The concept according to the invention also makes it possible to combine groups of shaped pins into subunits, which can be handled and transported without the risk of changing the set partial shaped area, but which nevertheless ensures that after the different shaped pin groups have been placed side by side one has essentially one has a continuous, continuous molding surface.

Advantageous developments of the invention are specified in subclaims.

The use of a screw drive for supporting the shaped pins (claim 2) is advantageous with regard to a simple, precise adjustment of the end faces of the shaped pins. This setting can also be done particularly easily using a robot. Such a strut, which is adjustable in length, is particularly insensitive to high temperatures.

The development of the invention according to claim 3 is advantageous in terms of a good and safe alignment of the shaped pins regardless of their axial position.

With the development of the invention according to claim 4 it is ensured that the for setting a shape Pin used screw drive is protected against high temperatures under casting conditions.

If, according to claim 5, the threaded bore or spindle nut of the screw drive is provided on the guide section, the adjustment of the screw drive can be carried out particularly conveniently on the head of the adjusting screw which always occupies the same axial position.

The development of the invention according to claim 6 has the advantage that the position of the mold surface does not change significantly if the temperature prevailing during the casting process differs from that temperature which was used as the basis for the specification of the desired positions for the various shaped pins.

The development of the invention according to claim 7 allows the initially stair-shaped surface to be converted into a smooth surface by mechanical reworking.

The development of the invention according to claim 8 makes it possible to select the material from which the volume of the shaped pins is made in a way that is particularly favorable in terms of thermal properties or machinability. Nevertheless, the desired mechanical cohesion of the shaped pins is guaranteed. If the sheathing is thin, it does not represent a high resistance for the processing tool if a staircase-shaped surface is to be machined.

If groups of shaped pins are provided on holding plates, as stated in claim 9, these groups of shaped pins can be adjusted on clearly arranged small devices, in particular using an automatic machine. Use groups of shaped pins- the holding plates is also advantageous with regard to the simple fastening of the shaped pins in the molding box and with regard to the realization of molding boxes of different sizes using uniform basic components. Due to the fact that the holding plates are in turn adjustably attached to the frame of the molding box in the axial direction of the shaped pins, it is not necessary to provide an excessively large axial adjustment path for the individual shaped pins, but can nevertheless produce castings having large dimensional differences parallel to the longitudinal axis of the shaped pin.

The development of the invention according to claim 10 is advantageous in terms of a simple and resilient attachment of the holding plates to the molding box frame.

In the case of a casting mold according to claim 11, the individual holding plates and the pin groups carried by them can be very easily connected to the mold box frame, whereby the juxtaposition of the pin groups in two mutually perpendicular directions automatically results (one by impact, the other by the Distance of the rails).

The development of the invention according to claim 12 allows partial areas of the mold surface, in which different requirements are placed on the variability of the mold surface, to be realized economically. In extreme cases, edge areas of the mold box parting surface, which only serve to close the mold cavity, can simply be closed with holding plates which only carry a single cuboid shaped pin. These shaped pins then only need to be adjusted to the mold interface, no further adjustment work is necessary. In such Edge areas of the molding box can then also be attached to holding plates which are provided with sprue channels and ventilation channels.

The further development of the invention according to claim 13 is also advantageous with regard to simple insertion of the molded pins into the molded box and simple removal of the molded pins from the molded box.

With the development of the invention according to claim 14 it is achieved that the temperature on the molding box frame and thus on the mechanism for hanging and carrying the molded pins is kept down.

A casting mold according to claim 15 has a substantially smooth molding surface. In the case of large casting molds, the end faces of the shaped pins are preferably machined separately for such a shaped pin group, after the axial position of the shaped pins of a holding plate has been set. In this way, you do not need CNC machines with large travels. Where such machines are available, one can carry out the reworking of the stair surfaces formed by the shaped pin end faces to a smooth, continuous shaped surface, but also on the casting mold itself.

According to claim 16, a continuous molding surface can also be obtained by spreading the stair surface formed by the molding pin end faces with a heat-resistant moldable material, which also gives an essentially continuous molding surface. If such a streaked casting mold is readjusted, the molding compound applied to the end faces of the shaped pins usually separates itself when the shaped pins are adjusted unevenly. This may are still supported by spraying the mold pin end faces with a release agent before applying the moldable material.

The development of the invention according to claim 17 is advantageous with regard to the lowest possible weight of the shaped pins and / or their adjustment mechanism, which facilitates the handling of the shaped pins and entire groups of shaped pins. Insofar as an end section of the shaped pins remains solid, machining of their end faces to produce a continuous shaped surface is also possible with such shaped pins.

The cavities provided in shaped pins according to claim 17 can also be used for cooling purposes according to claim 18.

The development of the invention according to claim 19 permits automatic adjustment of the end faces of the individual shaped pins to the desired shaped surface. This is particularly advantageous in the case of very large shapes and in the frequently alternating production of different products.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing. In this show:

Figure 1: a vertical section through a mold for a propeller blade;

Figure 2: a horizontal section through the in Figure

1 shown casting mold along the section line II-II;

FIG. 3: a front view of two adjacent shaped pin units of the mold shown in Figures 1 and 2;

FIG. 4: an enlarged side view of a molded pin unit, in which two molded pins are shown in a fully retracted or maximally extended position;

FIG. 5 shows a section through the shaped pin unit shown in FIG. 4 and part of an adjacent shaped pin unit along the section line V-V of FIG.

FIG. 6: a top view of the top of the shaped pin unit shown in FIG. 4;

FIG. 7: a schematic plan view of a mold box of the casting mold shown in FIG. 1 and the mold surface predetermined by it;

Figure 8 is a schematic representation of a device for the automatic axial positioning of the molded pins of a molded pin unit and

Figure 9: a longitudinal section through a modified shaped pin and its adjustment mechanism.

FIG. 1 shows a casting mold for a propeller blade of a ship's propeller, which consists of a lower molding box, generally designated 10, and an upper molding box, generally designated 12.

The two molding boxes 10, 12 have in principle the same structure, so that it is sufficient to one of the molding boxes in the Describe detail. For reasons of better clarity, reference numerals for components of the two molding boxes 10, 12 are only entered once in one of the molding boxes.

The molded boxes each have a supporting box part 14, which is equipped on the outside with supporting bolts 16, on which rope straps can be hung. Furthermore, the box parts 14 of the mold separating surface have adjacent tabs 18 on which the two mold boxes

10, 12 are releasably connected to one another by means of screws 20 and nuts 22.

The inner surfaces of the box parts 14 are covered by heat-insulating pads 24. Vertical supports 26, which are arranged in regularly spaced rows and each carry rails 28, extend through these and extend to the bottom or top wall of the molding box part. The latter have a similar cross-sectional shape to that of a double-T beam. As can be seen from Figure 3, 28 running walls 30 are welded to the vertical webs of the rails. These work with their top and bottom with vertically spaced trunnions 32 (or impellers), which belong to a total of 34 designated head. The latter also includes a mounting plate 36, which is to be understood with the openings 38.

Mounting sections 42 of a total of 44 shaped pin units can be fastened to the latter by means of setting pins 40, for which purpose the mounting sections 42 are provided with a set of setting openings 46, different ones of which can optionally be moved into a position aligned with the setting openings 38. In this way, the shaped pin units 44 can be in different vertical positions with the running heads 34 connect and hang them on the rails 28.

As can be seen from FIGS. 1 and 2, the spacing of the rails 28 is chosen to be exactly the same as the lateral dimension of a shaped pin unit 44. If one successively introduces shaped pin units 44 into the adjacent rails 28 running perpendicular to the drawing plane in FIG. 28 in the direction perpendicular to the drawing plane, a shaped surface which is curved in two steps in a stepped manner can be produced in accordance with the different vertical position of the shaped pin units. For the sake of clarity, the lower end faces behind the stylus units lying behind the plane of the drawing are omitted in FIG. It is understood that these end faces in the direction perpendicular to the plane of the drawing to the edge of the

Advance mold boxes towards the mold parting surface in the same way as is shown for the lateral direction in FIG. 1.

So that the rails and running heads 34 that position the molded pin units do not have to absorb large tilting moments under casting conditions (in this case, the play between trunnion 32 and the running wall 30 would have to be very small, which would impair the displaceability of the running heads 34) carry the peripheral walls of the Box parts 14 furthermore lateral support rails 48 which engage in a region of the peripheral pin units 44 adjacent to the fastening plate 36 or in a region adjacent to the end faces of these pin units. These support rails can be pretensioned by springs or conceivable against the interior of the housing by means of tensioning screws (not shown in the drawing).

Additional lateral support rails 50 engage in the outside the marginal rails 28 a. They are in turn carried by box part 14.

In the exemplary embodiment considered here, the interior of the casting mold is divided into two sections: a section on the left in FIG. 2 contains the actual molding space, which has a finely stepped molding surface that follows the product surface and is formed by a large number of small-sized molding units 44, as described above . Those parts of the mold cavity which relate to the sprue are located in a mold section on the right in FIG. In this section of the casting mold, a fine shaping surface specification is not necessary, so that there are used pin units 52, the edge dimensions of which are each twice the edge dimensions of the pin units 44. In the exemplary embodiment considered here, rails 54, to which the shaped pin units 52 are attached in a similar manner, as described in detail above for the shaped pin units 44 in connection with the rails 28, are mounted in a direction perpendicular to the direction of extension of the rails 28. The shaped pin units 52 can be installed and removed through a pivotable door that is provided in a side wall of the box part.

The shaped pin units 52 have predominantly one-piece, cuboid shaped shaped pins 58 which abut one another with their end faces at the mold separating surface. Only the three middle form pins of the one on the left in FIG. 2

A series of the shaped pin units 52 are formed with sprue channels and distribution channels for liquid metal, not shown, which open out into the mold space 60 (see FIG. 1) delimited by the shaped pin units 44. By attaching the shaped pin units 44 to the rails 28 in different alignments of their pegging openings 46 on the pegging openings 38, a relatively roughly stepped step-shaped molding surface 62 is obtained, as shown in FIG. 1. In order to be able to fine-tune the molding surface 62 to a desired workpiece surface, the molding pin units 44 each have a multiplicity of individual molding pins 64 arranged in a matrix, which can be adjusted independently of one another in the axial direction, as will be described in more detail below. In this way, the large step in FIG. 1 between adjacent shaped pin units 44 can be resolved into a large number of smaller steps between adjacent shaped pins 64. This gives a fine approximation of the shaped surface 64 to the workpiece contour, as indicated in the right part of FIG. 3.

The shaped pins 64 (see FIG. 4) have a core 66 with a square cross-section, which has a casing with only a small wall thickness

68 is surrounded (the wall thickness is shown exaggerated in Figure 4 only for explanatory purposes). The core 66 consists of a material which has only small thermal expansion coefficients, at least in the range of the temperatures occurring under molding conditions for the molded pins, preferably has only small thermal expansion coefficients in the entire temperature range between room temperature and casting temperature. Such a material is, for example, graphite, as is used for the production of electrodes. Another material that is suitable in terms of thermal and mechanical properties is wood. However, graphite is preferred because it can easily be industrially formed into rods of the desired geometry using the technology developed for graphite electrodes. The graphite cores 66 are releasably connected to the sheath 68 via transverse pins 70. The casing 68 is connected to an inner telescope part 74 via a weld seam 72, an insulating piece 76 being arranged in the end section of the casing 68 facing the latter in order to thermally decouple the telescopic part 74 and the graphite core 66.

The inner telescopic part 74 works together with a likewise cylindrical outer telescopic part 78, the upper end of which is welded to a holding plate 80. The inner telescopic part 74 and the outer telescopic part 78 together form a telescopic guide. A spindle nut 82 is welded into the upper end of the inner telescopic part 74. This works together with an adjusting screw 84, the upper end of which supports a bearing disk 86 which cooperates with the underside of the holding plate 80. The latter, together with a head 88 of the adjusting screw 84, forms a radial / axial bearing. By turning the adjusting screw 84 of a shaped pin 64, its end face can thus be precisely and easily adjusted in the axial direction between a fully retracted (left half of FIG. 4) and a fully extended (right half of FIG. 4) position.

The pitch, the profile and the fit of the thread of the adjusting screw 84 and the spindle nut 82 as well as the material of the latter are chosen so that the threaded drive formed by them under all casting conditions, under which the casting mold is to be used, in a stress-free state and under vibrations to which the mold is exposed is self-locking.

As can be seen from the drawing, the shaped pins have 64 in the exemplary embodiment considered here in each case a square cross section, and a shaped pin unit 44 each comprises a grid arrangement of 10 × 10 shaped pins and is therefore itself square.

The fine contour of a shaped surface 62 can thus be adjusted by adjusting the various shaped pins 64, and the rough contour of a shaped surface 62 can be adjusted by setting out the individual shaped pin units 44 on the associated running heads 34. In this way, workpieces with a surface that varies greatly in the vertical direction can also be produced with a limited adjustment path of the individual shaped pins 64.

Figure 7 shows schematically the profile of a propeller blade 90 for a propeller. To produce this wing, the shaped pins 64 of all the shaped pin units lying outside the wing contour are fully advanced. For these shaped pin units it is alternatively also possible to use simplified shaped pin units which simply have a single graphite block which is dimensioned such that the block end face lies in the mold separating surface when the shaped pin unit is correspondingly staked out. For those shaped pin units 44 which are cut from or lie within the edge contour of the propeller blade 90, the individual shaped pin units 44 are staked out and the shaped pin end faces are adjusted axially so that a finely stepped shaped surface is obtained which is continuous on the outside the target workpiece surface. The shaped pin units indicated by dashed lines in FIG. 7 can again be formed by single-block shaped pin units in which the block end faces lie in the mold separating surface. Some of these latter shaped pin units are like this edited that you get a sprue.

The mold boxes set as described above are assembled to cast a workpiece and separated from one another again after the workpiece has solidified. The removed workpiece has a finely stepped surface, from which only a small amount of material has to be removed by machining in order to achieve the desired surface.

In a modification of the exemplary embodiment described above, after the axial setting of the shaped pins 64, the surface of the individual shaped pin units can additionally be processed with a multi-axis CNC milling machine, so that the end face of a shaped pin unit with a tolerance of 0 in practice , 1 to 0.2 mm corresponds to an assigned area of the desired workpiece surface. After being inserted into the housing parts 14, the shaped pin units 44 processed in this way then form a smooth shaped surface 62 which comes very close to the desired workpiece surface.

If large-stroke multi-axis CNC machines are available, the shaping of the shaped surface 62 by milling can also take place after the preset shaped pin units 44 have been inserted into the box parts 12 or 14.

In a further modification, a continuously continuous molding surface can also be achieved by smoothing the finely stepped molding surfaces obtained after the installation of molded pin units 44 into the box parts 14 of the molding boxes 10, 12 with a pasty material (e.g. graphite slurry), for example using rubber Scrapers or the like. A very good approximation of the shaped surface 62 is also obtained in this way to the desired workpiece surface, but the shaped pins 64 remain unchanged.

A mold made using graphite pins as described above can be used to successively cast a smaller number of workpieces, e.g. for casting three to five propeller blades for a propeller. The shaped pin units can then be used for the production of casting molds for other workpieces.

The axial setting of the shaped pin end faces can be carried out automatically in a simple manner and taking into account the individual wear of the shaped pins with a device, as is shown schematically in FIG. 8.

A C-shaped bracket part 92 can be displaced in the x, y and z directions by coordinate drives 94, 96, 97, which are only indicated schematically. By shifting in the x and y directions, a distance sensor 98 carried by the lower arm of the bracket part 92 can be placed one after the other under the end faces of the various shaped pins 64 of a shaped pin unit 44. This takes place under the control of a control unit 100, which operates as a function of a main control 102. The upper arm of the bracket part 92 carries, with the spacer 98 in vertical alignment, a nut 104, which can be rotated by a servomotor 106 through predetermined angles in one direction or the other.

The servomotor 106 is controlled by a control unit 108 which is supplied with the output signal of the distance sensor 98 at a first input and with a set position signal for at a second input the end face of the shaped pin under consideration is acted upon, which provides a shaped surface memory 110. A set of data is stored in the shaped surface memory 110, which corresponds to the finely stepped shaped surface 62. The mold surface memory 110 is loaded via an interface assigned to the main control 102 in accordance with data derived from CAD data for the workpiece to be produced (provision of the required oversize, stair formation).

Addressing of the shaped surface memory 110 takes place, on the one hand, according to the later position of the shaped pin unit 44 in the shaped surface 62. For this purpose, a reading head 112 reads out a machine-readable coding 114 attached to the side of the holding plate 80. This forms a partial address for the shaped surface memory 110. The other address parts were formed by the x and y position of the bracket part 92, which signals are sent from the control unit 100 to further address terminals of the shaped surface memory 110. The shaped surface memory 110 thus provides a nominal position signal corresponding to the nominal position of the end face of that shaped pin, which is just in front of the distance sensor 98.

In a modification of the exemplary embodiment described above, it is also possible to work with shaped pen units 44 that are initially not individualized by coding and instead of the read head 112 to provide a write head, for example an inkjet write head, which writes an instruction on the holding plate 80 where the shaped pen unit 44 in the box part is to be installed, for example a statement "third rail, sixth position". The attachment of such human-readable information can be done with the y-adjustment of the holding plate in the course of the adjustment of the the head of the adjacent row of shaped pins. Optionally or in addition, the same information can also be written on the holding plate in machine-readable form.

In the exemplary embodiment according to FIG. 9, components of the shaped pin attachment which have already been explained in a functionally equivalent manner with reference to FIGS. 1 to 4 are again provided with the same reference symbols.

An axially short shaped pin 64 made of graphite has a sleeve-shaped recess 116 with which it is inserted directly into the end of the inner telescopic part 74 and is secured there by the pin 70. The adjusting screw 84 is designed as a hollow screw and radial feed openings 118 are provided in its section lying in the holding plate 80. These communicate via an annular groove 120 which has a flow cross-section which is large in comparison with the total area of the feed openings 118, with a feed channel 122 which runs in the longitudinal direction of the plate and intersects the successive annular grooves of a row of form pins.

The axial channel 124 formed in the set screw 84 opens freely into the telescopic part 74. The spindle nut 82 is formed with a plurality of axial passages 126 distributed in the circumferential direction, and exhaust air openings 124 distributed in the circumferential direction are provided in the upper end section of the telescopic part 78.

When successive shaped pin units 44 are pushed into a rail 28, their feed channels 128 are thus connected. The ends of the feed channels 128 assigned to the various rails 28 are connected with a compressed air source, compressed air flows through the channels 124 of the various adjusting screws 84 into the interior of the inner telescopic part 74, is reflected by the rear end face of the graphite shaped pin 64 and flows through the passages 126 into the space that is above the impact and is located fluid-tight adjacent pins 64. The used cooling air can flow out through openings provided in the side walls of the box parts 14 and not shown in the drawing.

In the exemplary embodiment according to FIG. 9, the shaped pins 64 are not surrounded by a sheath, so they form the shaped surface 62 alone. This is advantageous with regard to particularly easy finishing of the shaped surface. By changing the small-volume shaped pins, you can restore the shape of the mold with little waste.

In the exemplary embodiment according to FIG. 9, the shaped pin 64 also has larger radial dimensions than the telescopic parts 74, 78. This is advantageous with regard to reducing the total number of telescopic guides and screw drives required if a somewhat coarser step of the shaped surface is more acceptable .

In the exemplary embodiments described above, a threaded spindle and a spindle nut cooperating therewith each formed a self-locking threaded drive for the adjustable support of a shaped pin or a shaped pin group. Other length-adjustable struts, which can also be used with good thermal shielding of the support against the cavity, are hydraulic or pneumatic working cylinders with a locking device or other linear drives, e.g. racks moved by pinions.

Claims

claims

1. Adjustable casting mold, with a box part (14) and with a plurality of box part (14) carried, a shaping surface (62) defining and abutting shaped pins (64) which are adjustable in the axial direction, characterized in that the shaped pins ( 64) are each supported on the box part (14) by means of a strut (82, 84) which is adjustable in length.

2. Casting mold according to claim 1, characterized in that the adjustable strut has a self-locking screw drive (82, 84).

3. Casting mold according to claim 1 or 2, characterized in that the shaped pins (64) each with a

Guide section (74) are connected, which runs in a fixed guide part (78).

4. Casting mold according to claim 3, characterized in that the guide sections (74) each have a

Insulating piece (76) are connected to the associated shaped pin (64).

5. Casting mold according to claim 3 or 4 in connection with

Claim 2, characterized in that a set screw (84) extends through the guide part (78) and works together with a spindle nut (82) carried by the guide section (74), the set screws (84) each having an axial / radial bearing (86) are connected to a holding plate (80) which in turn is attached to the box part (14).

6. Casting mold according to one of claims 1 to 5, characterized characterized in that the shaped pins (64) are made of a material with a low coefficient of thermal expansion, in particular graphite or wood.

7. Casting mold according to one of claims 1 to 6, characterized in that the shaped pins (64) are made of a slightly machining material, in particular graphite or wood.

8. Casting mold according to claim 6 or 7, characterized in that the shaped pins (64) are at least partially surrounded by a casing (68) which consists of heat-resistant and mechanically resilient material, in particular steel.

9. Casting mold according to one of claims 1 to 8, characterized in that groups of shaped pins (64) are carried by holding plates (80) which in turn are adjustable in the longitudinal direction of the pin (38, 40, 46) on the box part (14) .

10. Casting mold according to claim 9, characterized in that the holding plates (80) with assembly sections

(42) are connected, which have a plurality of pegging openings (46) spaced apart in the longitudinal direction of the pin and are connected via pegs (40) to a fastening part (36) carried by the box part (14).

11. Casting mold according to claim 9 or 10, characterized in that the holding plates (80) with running heads

(34) are connected, which run in rails (28) carried by the box part (14).

12. Casting mold according to one of claims 9 to 11, characterized in that it is in different areas the shape has shaped pin units (44, 52) of different sizes, each having a holding plate (80) and a plurality of shaped pins (64) carried by this or a single shaped pin (58).

13. Casting mold according to one of claims 1 to 12, characterized in that the box part (14) has a door (56) in at least one of its side walls.

14. Casting mold according to one of claims 1 to 13, characterized in that the box part (14) has on its inside a heat-resistant and poorly heat-conducting lining (24).

15. Casting mold according to one of claims 1 to 14, characterized in that the end faces of the shaped pins (64) are machined to form a continuous shaped surface (62).

16. Casting mold according to one of claims 1 to 14, characterized in that the stair surface formed by the shaped pin end faces is at least partially covered by a heat-resistant moldable material to form a continuous molding surface, preferably with the interposition of a release agent.

17. Casting mold according to one of claims 1 to 16, characterized in that the shaped pins (64) and / or parts (74, 78, 84) holding them are formed at least in sections as hollow parts.

18. Casting mold according to claim 17, characterized in that the hollow parts are connected to a supply line (122) for cooling medium.

19. Device for adjusting the mold surface of a casting mold according to one of claims 1 to 18, characterized by a distance sensor (98) which can be moved in a reference plane and which is associated with the distance between the end face of the respective stylus (64) standing in front of it and the reference plane Generates an output signal, a shaped surface memory (110) which can be addressed according to the position of the distance sensor (98), a control unit (108) acted upon by the output signals from the distance sensor (98) and shaped surface memory (110), and a drive unit (106) controlled by the latter, which is coupled (92) to the distance sensor (98) for common movement with respect to the shaped pin arrangement (64) and acts on the threaded drive (82, 84) of the shaped pin (64) standing in front of the distance sensor (98), that the end face of this shaped pin (64) is moved to a position corresponding to the desired point on the workpiece forming surface.